MULTILEVEL ELECTRONIC POWER CONVERTER

摘要

Multilevel electronic power converter for n output voltage levels, with a positive branch (POS) with a positive DC voltage terminal (1), a negative branch (NEG) with a negative DC voltage terminal (2), and an AC voltage terminal (3) connected to the positive branch (POS) and to the negative branch (NEG); at least two DC bus capacitances (4) interconnected between the positive DC voltage terminal (1) and the negative DC voltage terminal (2), and an intermediate DC voltage terminal (5) connected between the two DC bus capacitances (4); at least two first external semiconductors (6) and at least two second external semiconductors (7), with respective diodes reverse-connected in parallel, respectively connected in series in the positive branch (POS) and the negative branch (NEG) between the DC voltage terminal (1, 2) and the AC voltage terminal (3); at least one high-current DC capacitance (11) connected between the positive branch (POS) and the negative branch (NEG), and at least two high-frequency, low-current capacitances (12, 13, 14) connected between the positive branch (POS) and the negative branch (NEG); an internal branch (INT) which is connected in parallel with each high-current DC capacitance (11) and comprises at least two internal semiconductors (9), with diodes reverse-connected in parallel, connected in series with one another and connected to an intermediate terminal (10); at least one intermediate semiconductor (8) which is formed by two controlled semiconductors, with diodes reverse-connected in parallel, reverse-connected in series and is connected between the intermediate DC voltage terminal (5) and the intermediate terminal (10).